From the Boardgame Geek:
Every turn, players flip a stone tile to its face up side. They have to decide whether they continue a path of stones, or simply leave it at its position. Instead of flipping a new stone tile, players may decide to take one that is already flipped. The larger the path of stones, the more points a player scores. And don't forget to collect wishing stones; otherwise you get a minus score!
Language Note: This game is imported from Germany. An English translation of the rules is provided. Game components are language independent.